package org.zhaolei.mapper;

import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import org.apache.ibatis.annotations.Param;
import org.zhaolei.model.CouponDO;

public interface CouponMapper extends BaseMapper<CouponDO> {
    int reduceStock(@Param("couponId") long couponId);
}
